Hewlett-packard Development Company, L.p.

Jose Francisco Bravo De Vega

Jordi Bas

Francisco Gomez

David Soriano Fosas

Vicente Granados Asensio

Alejandro Mielgo

Marc Soler Jauma

Javier Gonzalez Bruno

Ignacio Soler Flores

David Sala Porta

Apparatus to detect droplets and methods for detecting droplets are described. The apparatus comprise a light emitter and a light detector. The light emitter is to emit light along an optical axis, the light having a spatial intensity distribution profile with a peak that is non-coincident with the optical axis. The light detector is located relative to the light emitter such that, in use, the peak of the spatial intensity distribution profile is incident on the light detector.

Droplet detection

In some examples, a printhead drop detector comprises a plurality of drop detection units. Each drop detection unit may comprise a radiation source and radiation detector and may be to detect a drop passing through a sampling volume between the radiation source and the radiation detector. A radiation detector of a first drop detection unit and a radiation source of a second drop detection unit is arranged on a first side of the sampling volume; and a radiation source of the first drop detection unit and a radiation detector of the second drop detection unit is arranged on the second side of the sampling volume.

Printhead drop detectors

Methods and apparatus for assessing power usage of at least one printer component in a printer are described. For example, based on a print instruction (the print instruction being to cause the printer to carry out a printing task), power usage requirements of the at least one printer component in carrying out the print instruction may be determined. The power usage may be determined for each of a plurality of time intervals. In some examples, the effect of the printer component(s) in carrying out the print instruction on at least one power quality measure associated with a power supply network which may be connected to the printer may be considered.

Printer power usage

Examples of a printing device, a method for use in a printing device, and a machine readable non-transitory storage medium including instructions relating to a printing device that are executable by a processor are disclosed herein. An example of the machine readable non-transitory storage medium includes instructions relating to a printing device that, when executed by a processor, cause the processor to: segment data for an image into a plurality of positions, analyze performance data regarding an actual portion of the image formed by each of a plurality of print heads, arrange the segmented image data for each portion of the image based on the performance data for each of the print heads, and transmit the arranged image data to each of the print heads so that each print head forms a correct portion of the image.

Arranging image data segments in printing devices

In some examples, a printhead drop detector comprises a plurality of drop detection units to detect any drops passing through a sampling volume between the radiation source and the radiation detector. A radiation detector of a first drop detection unit and a radiation source of a second drop detection unit is arranged on a first side of the sampling volume and a radiation source of the first drop detection unit and a radiation detector of the second drop detection unit is arranged on the second side of the sampling volume. The distance between the first drop detection unit and the second drop detection unit is based on an angle of a beam producible by the first radiation source such that the beam is wide enough to cross into a portion of the sampling volume corresponding with the second drop detection unit.

Growing community of inventors

Sant Cugat del Valles, Spain

Jose Francisco Bravo De Vega